https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92587
--- Comment #5 from DIL <liakhdi at ornl dot gov> --- If this helps, the gcc/gfortran svn repository from 17 Jan 2019 already had this regression bug while gcc/gfortran 8.2.0 did not. Hopefully this may help shorten the length of bisection.